Congratulations to Dain Sires of Cedar Falls, Iowa on his conversion of a 2015 YZ450F! I absolutely love the clean look of the battery and motor mount treatments on this build. YZ's are one of my favorites and Dain has done an excellent job with the design, engineering and fabrication of this bike's streamlined and factory like finish. Feel free to comment and ask Dain Sires in questions in the comments below. Here are some details about the build.

Build Specifications:
- 2015 Yamaha YZ450F chassis/suspension
- Motenergy ME1304 PMAC Motor
- Sevcon Gen4 Size6 motor controller
- Domino Throttle assembly
- 3kwh 24S prismatic cell lithium pack (2x Honda Clarity 12S modules) 100.8V peak
- AMP 10T front sprocket, Vortex 60T rear sprocket - Cycle Analyst V2.4, remote shunt
- Decals by Rooster Graphics of Des Moines, Iowa

Performance Characteristics and Project Functional Requirements:

The goal of this build is to achieve a level of performance similar to a modern 450cc EFI fourstroke motocross bike for a period of 10-15 minutes of intense track riding. In current phase of tuning/build the performance is significantly higher than a 250F, but not quite to 450F levels of power. Low end torque is tolerable, the bike shines between 20-40mph. Next steps are to liquid cool the motor and add a heat sink to the controller.

For more information about Dan's company, SSE Sires Systems Engineering check out his FB page:
https://www.facebook.com/SSE-Sires-Systems-Engineering-215034522434851

CUSTOM BUILD BY:
Sketch Coleman, Australia

BUILD SPECS:

- Crf250X frame - road registered
- Engineering in progress
- Capable of 54,000W
- Mobipus 72600 controller running 600a battery, 800a phase
- 90V Lipo capable of 1200A Peaks from Chris Jones
- Domino Throttle
- M Force Motor
- 72mm2 battery and phase cable
- 72T Rear sprocket with either 11,12,13,14T front depending on track
- 520 Xring chain
- Radiator & water cooling system & race lines
- 17” talon supermoto rims
- 7” dash tablet for tuning and gauges
- 10A dc-dc converter for 12V system
- 1000A contactor
- 0-100kph 2.9s recorded, 2.4 on paper
- Total weight 120kg
- 750NM torque

CUSTOM BUILD BY:
Gabriel Yeung, Philippines

BUILD SPECS:
- Donor Frame: Zhongshen 200 GS (modified with tubular steel)
- Motor: QS 171 100h 8000w Mid Drive
- Controller: Kelly 8080i 72v @ 700a peak
- Battery: 72v 90ah LifePo4 cells
- Body: Custom fiberglass farings
- Weight: ~300lbs.
- Sprockets: 13t front, 56t rear (geared for strong torque)

CUSTOM BUILD BY: Daren Crigler

BUILD SPECS:
- RM85L electric conversion
- Golden Motor 10KW BLDC
- Sabvoton 96150
- Custom 30S16P Samsung 25R5 pack
- Custom aluminum frame
- RM85L suspension
- 20KW peak (27HP)
- 230lbs. curb weight
- Geared for strong torque
- Top speed 70mph (112kph)
- 90% charge in 2hrs., 100% charge in 4hrs.